Battery life of the transmitter is the same legendary "30 hours off a single AA battery" as for the WMS 40 models, reducing the need to replace batteries and thus saving real money in the long run.The system includes an SR 40 MINI receiver, an HT 40 MINI handheld transmitter, a universal power supply adapter, and one AA size battery.

Battery life of the transmitter is the same legendary "30 hours off a single AA battery" as for the WMS 40 models, reducing the need to replace batteries and thus saving real money in the long run.The system includes an SR 40 MINI receiver, an HT 40 MINI handheld transmitter, a universal power supply adapter, and one AA size battery.